Electric heating radiator



April 1929. A. ANDERSON ELECTRIC HEATING RADIATOR Filed Dec. 16. 1925 Patented Apr. 16, 1929.

UNITED STATES 1,709,052 PATENT OFFICE.

ALLEN ANDERSON, OF CHICAGO, ILLINOIS, AssIGNoR To WHITE BEAUTY ELECTRIC COMPANY, INC, A CORPORATION OF ILLINoIs.

ELECTRIC HEATING RADIATOR.

Application filed December 16, 1925. Serial No. 75,684.

The invention relates to improvements in the construction of the heat generating and deflecting portions of electric heating radiator, and the primary object is to provide 1mprovements in the construction whereby the device may be made more economlcally than devices of this character heretofore constructed.

Itis another object of the invention to simplify the construction and method of manufacture of electric heating radiator of the character described. 7 I

It is a further object of the invention to provide improvements in electric heating raditor whereby the heating elements may be connected to and disconnected from the device with facility, thereby cheapening the cost of assembly and of manufacture, and also rendering the device more satisfactory in the hands of users because of the ease with which the heating element of the radiator, may be removed for replacement in case of a defective heating element.

A furtherobject of the invention is to pro vide, in a detachable form, certain improvements in the electric heating element, thereby securing greater economy in manufacture, assembly and replacements.

Other objects of the invention will appear from the following description of the preferred embodiment of the'in'vention as set forth in the accompanying specification directed to the preferred embodiment of the in: vention as depicted in the drawing which forms a part of the specification, the novel features being more particularly pointed out in the a iperided claims.

In the said drawing, Fig. 1, is a view of the device in side elevation, with the radiator portion of the heater in vertical section one line extending diametrically through the axis of the radiator or reflector portion thereof and showing the heating element in position therein.

Fig. 2 is a longitudinal section view through the heating element taken on line 22 of Fig. 1, looking in the direction indicated by the arrows.

Fig. 3 is an end View of the binding post end of the heating element, with broken adjacent portions of the reflector to which it is attached, and Fig. 4 is a sectional view on line l- 1 of Fig. 3, looking in the direction indicated by the arrows and, together with Figs. 2 and 3, illustrates the details of the brackets 14: and

quickly detachable connection of the heating element with the reflector.

Inthe embodiment of the invention illustrated in the drawings the same is shown applied to a conventional parabolic type of re flector for the heat rays as designated generally by reference character 10, the same being preferably formed of sheet metal, with the inner reflector surface polished and provided with a coating of heat reflecting material, as a coating of copper or other analogous metal. The reflector 10, for economy in manufacture, is preferably made of a stamping circular in form, with an outer peripheral beaded portion as designated at 11, in which the beaded portion 11 is not entirely closed, but rather of a semi-circular form, as illustrated in Fig. 1, thus affording ready means for attachment to the outer periphery of the reflector body of the radially extending guard wires 12, of which there are a plurality according to the conventional form of construction, all secured to and radiating from the center plate 13, these radial guard wires being curved at their extremities, as indicated at 14, to engage over and be retained upon the aforesaid curved peripheral edge 11 of the reflector. The reflector is preferably pivotally connected by means of brackct 1 1- and pivot pin 15, with the usual supporting base 16 formed of cast iron or other suitable metal, and the heater may be rend cred readily portable by means of the handle 17 secured by metal bracket 18 and rivet 19 in a convenient location on the upper portion of the convex side of the member 10. Both the 18 preferably made from metal stampings, and thebracket 14, like the bracket 9, is preferably secured to the reflector 10 by rivets as indicated at 19.

The detachable heating element is of a special improved construction, and the body of the same, COIHPIlSlDQ theusual heat generating or radiating element, is preferably molded in the form illustrated more clearly in the sectional View of Fig. 2 and may be made of any suitable refractory substance adapted for use inthe construction of similar electric heating elements. The form of this element or core, which is designated generally by reference character 25, is that of a cylinder, with one end open and the other end closed by an integral closure member. as designated by reference character 26. The closure member 26 is, for strengthening purallv by poses, provided with a thickened portion, indicated at 27, which extends diametrically across the end of the closure member 26 or the exterior thereof, the same being preferably perforated to receive the terminal or binding posts 28, 29, formed in the usual manner to receive the ordinary socket connections of the electric circuit wires not herein shown, as the same "form no part oi? the present invention. Thebinding posts 29 are preferably provided with enlargements 50 which may be angular-1y formed to take a suitable tool, as a \i'rench. and spaced-apart openings are provided in the llll'iClKCli d portion 2? oi the closure member 2G for the reception oi these l'iinding posts wiih pro t rude on the interior of the hollow cyluulrrcal member 25 and are screw-threadcd to take the usual retaining nuts, of which there are prete 'ably two to each post, designed to secure the terminals ot the wire coiled on the heating element thereto. Such screw-threaded nuts are designated by reference characters 31. 32 shown on the post 29 in i 1g. 2.

)n the opposite sides of the thickened portion 27 or the closure member 26 perforations are provided "for the reception of screws 34; which are threaded on their interioriy extending portions to receive the usual nuts, as designated at for binding the heating element socket and retaining pla 36 on the closed end of the heating element. This heating element socket and retaining plate 3 is ot a special cup-l1ke construction witn the bottom thereof slotted diametrically to tit over the raised or thickened portion 27 at the closed end oi? the heating elen'ient, and slots are pre'ie" ably provided in the sane manner to receive the retaining screi 38 3 1-. The member 86 may be made as a metal stamping and around the periphery thcreot there is a relatively wide band. designated uenerally by reference character 36, w is adapted to overlie the closed end ot the heating element. and around the 'free peripheral edge of the band 36 there is provided a radial ilauiie 37 adapted to engage the concave side oi? the reflector member in the man ner illustrated in the drawings. The heating element aside from the features already de scribed. may be of the usual or any desired construction, but I prefer to place the resistance windiu 's or coils, as designated genereterence character 40, in spiral grooves cast or formed on the outer periphery of the body 25 ot the heating element. The coils will be made of the usual or suitable resistance material for generating heat and may be conveniently wound in the grooves as indicated in Jigs. 1 and 2, with the terminal ends of the coils engaged to binding posts 2 29, the vire from the post 29 to the coil 40 being designated by reference character d1, Fig. 2, and extending through an anchoring perforation l2 at the inner or free end of the mcniher and extending thence in any desired number of convolutions as designated at d0, around the member 25 with the otl or end. passing through suitable opening not shown in the wall of the cylindrical portion adjacent the inner end of the coil and to an engaging position with the other binding or terminal post 28.

T he heating element socket and retaining plate 36, in addition to the peripheral flange 3?, has formed on the surface oi the peripheral side portion 36" two projections which are designated by reference characters 5O, 51. These may be formed by upsetting the material and forcing it in a direction outwardly at a distance spaced. apart from the flange 37 a little greater than the thickness of the material of which the reflector 10 is formed. The reflector 10 is provided with an approximate circular opening at its center to receive the heating element, and in order to furnish securing means therefor and at the same time to make the securing means of a quickly and easily detachable character, on diametrically opposite sides oi the central circular opening in the reflector 10, there are provided slots, as designated by reterence character 60, These slots are preferably on the upper and lower portions of the opening and ot' the approximate lorin shown most clearly in the enlarged detail views, Figs. 3 and i, the wall at one side of each slot being approximately radial to the center of the opening and the wall at the other side extendin angularly whereby to ai'l'ord a wedging suri'ace for the engagement of the radial projections 50, 51 on the heating element cap In order to further assist in securing the heating element cap in this opening in the reflector 10. the material around the opening adjacent the angle side of the slot bent oiit ot its normal plane pr ii orably toward the COllVtf-l side thereof, as designated at 65, 3 and 4t. This special construction o't the rciioctor 10 around the central opening tor the heatini element enables me to secure a s row-like el' c iect when the heating element is inserted in the manner showin for example, in Fig. 1.

with the socket member 36 pro ecting on the convex side of the reile tor and thahcatinecoil end of the element projecting on the concave side thereoi with the .ie'e 37 in engagement with the inner surface of the reflector plate around the opening therein. The insertion of the cap plate 36 ol the heating element is made possible by reason of the correspondence of the projections 50, 51 with the diametrically opposite slots in the re tiector l0, and the rotation given to the heating element when inserted in this manner will result in bringing both of the projections 50, 51 into engagement with the laterally proj'ecting portions adjacent the slots and resulting in a. wedging action between the re flector 10 and the supporting socket cap 35 of the heating element whereby the heating element will be retained in a secure position in relation to the radiator for performing its work as long as may be desired. However, in the event of failure of the heating element, it may be removed from the reflector plate 10, as a simple rotational movement releases the locking effect of the projections 50, 51 and brings them into register with theopenings '60, which will permit the heating element to be withdrawn and disconnected when the circuit wires are disconnected from the terminal posts 28, 29.

It will be seen that the improved construction, particularly of the reflector 10, and the heating element socket or cap 35, may be economically formed from sheet metal by comparatively simple stamping operations, and that the same is true of the other various parts of the device with the exception of the base, so that little machinery work is required, and the resulting cost of production of the completed article is reduced to the minimum. But one of the outstanding features of the invention resides in the ease with which persons having comparatively little knowledge of electrical devices may remove a defective heating element and replace it with a perfect unit without the necessity of resorting to the repair departments of electrical companies. Furthermore, the improvements with respect to economy of manufacture do not detract from the efficient operation of the heating element and reflector to the slightest extent as compared with more complicated devices that will not admit of repair without the services of an expert electrician. In order that the invention mightbe understood, I have shown and described the details of the embodiment which I prefer, but it will be apparent that of said core, binding posts or terminals nameto this specification, on this first mounted in said closure member and extending into the interior of said core, a resistance winding secured to said binding posts inside said core and extending outwardly thereof through said anchoring perforation in a manner to be positioned in said groove, and a re taining plate secured to the closure member.

2. A. heating unit comprising, in combination, a hollow cylindrical core, a closure member at one end of said core and formed integrally therewith, a thickened portion formed on the outer face of said closure member, terminals mounted on said thickened portion and extending into the interior of said core, a resistance winding secured to said terminals inside the core and extending outwardly thereof in a manner to be positioned on the periphery of the core, a retaining plate hav ing an opening formed therein adapted to receive said thickened portion, means for securing said retaining plate to said closure member, and means on said retaining plate for securing said unit to a support.

3. A heating unit comprising, in combination, a hollow cylindrical core having a spirally formed groove on its periphery and an anchoring perforation adjacent one end thereof, closure member at the opposite end of said core and formed integrally therewith, a thickened portion formed on said closure member and extending diametrically across the outer face thereof, terminals adapted for connection with an ordinary cord socket of an electric circuit mounted in said thickened portion and extending into the interior of said core, a resistance winding secured to said terminals inside the core and extending outwardly thereof through said anchoring perforation in a manner to be positioned in said groove, a cup-like retaining plate adapted to receive the closed end of said core and having a diametrically disposed elongated slot formed in its bottom portion and adapted to receive the thickened portion of the closure member, means for securing said retaining plate to said closure member, and means formed onsaid retaining plate for securing said unit to a support.

In testimony whereof I have signed my day of October A. D. 1925.

ALLEN ANDERSON. 

